Icon for a display screen



The FIGURE is a front view of an icon for a display screen showing our new design.

The broken line showing of a portion of the display screen illustrates unclaimed environmental structure and forms no part of the claimed design. The broken line showing of the quadrangular element within the icon is for the purpose of illustrating an unclaimed portion of the icon for a display screen and forms no part of the claimed design. 

The ornamental design for an icon for a display screen, as shown and described. 